Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/tcpdump/print-stp.c	Lines:	0	117	0.0 %
Date:	2017-11-13	Branches:	0	69	0.0 %


/*	$OpenBSD: print-stp.c,v 1.9 2015/01/16 06:40:21 deraadt Exp $	*/

/*
 * Copyright (c) 2000 Jason L. Wright (jason@thought.net)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Pretty print 802.1D Bridge Protocol Data Units
 */

#include <sys/time.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/ioctl.h>

struct mbuf;
struct rtentry;
#include <net/if.h>

#include <netinet/in.h>
#include <netinet/ip.h>

#include <ctype.h>
#include <netdb.h>
#include <pcap.h>
#include <signal.h>
#include <stdio.h>

#include <netinet/if_ether.h>
#include "ethertype.h"

#include <net/ppp_defs.h>
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
#include "llc.h"

#define	STP_MSGTYPE_CBPDU	0x00
#define	STP_MSGTYPE_RSTP	0x02
#define	STP_MSGTYPE_TBPDU	0x80

#define	STP_FLAGS_STPMASK	0x81		/* strip unused STP flags */
#define	STP_FLAGS_RSTPMASK	0x7f		/* strip unused RSTP flags */
#define	STP_FLAGS_TC		0x01		/* Topology change */
#define	STP_FLAGS_P		0x02		/* Proposal flag */
#define	STP_FLAGS_ROLE		0x0c		/* Port Role */
#define	STP_FLAGS_ROLE_S	2		/* Port Role offset */
#define	STP_FLAGS_ROLE_ALT	1		/* Alt/Backup port */
#define	STP_FLAGS_ROLE_ROOT	2		/* Root port */
#define	STP_FLAGS_ROLE_DESG	3		/* Designated port */
#define	STP_FLAGS_L		0x10		/* Learning flag */
#define	STP_FLAGS_F		0x20		/* Forwarding flag */
#define	STP_FLAGS_A		0x40		/* Agreement flag */
#define	STP_FLAGS_TCA		0x80		/* Topology change ack */
#define STP_FLAGS_BITS								\
	"\20\1TC\2PROPOSAL\5LEARNING\6FORWARDING\7AGREED\10TCACK"

enum {
	STP_PROTO_STP	= 0x00,
	STP_PROTO_RSTP	= 0x02,
	STP_PROTO_SSTP	= 0x10	/* Cizzco-Eeeh */
};

static void stp_print_cbpdu(const u_char *, u_int, int);
static void stp_print_tbpdu(const u_char *, u_int);

void
stp_print(p, len)
	const u_char *p;
	u_int len;
{
	u_int16_t id;
	int proto = STP_PROTO_STP;

	if (len < 3)
		goto truncated;
	if (p[0] == LLCSAP_8021D && p[1] == LLCSAP_8021D && p[2] == LLC_UI)
		printf("802.1d");
	else if (p[0] == LLCSAP_SNAP && p[1] == LLCSAP_SNAP && p[2] == LLC_UI) {
		proto = STP_PROTO_SSTP;
		printf("SSTP");
		p += 5;
		len -= 5;
	} else {
		printf("invalid protocol");
		return;
	}
	p += 3;
	len -= 3;

	if (len < 3)
		goto truncated;
	id = EXTRACT_16BITS(p);
	if (id != 0) {
		printf(" unknown protocol id(0x%x)", id);
		return;
	}
	switch (p[2]) {
	case STP_PROTO_STP:
		printf(" STP");
		break;
	case STP_PROTO_RSTP:
		printf(" RSTP");
		break;
	default:
		printf(" unknown protocol ver(0x%x)", p[2]);
		return;
	}
	p += 3;
	len -= 3;

	if (len < 1)
		goto truncated;
	switch (*p) {
	case STP_MSGTYPE_CBPDU:
		stp_print_cbpdu(p, len, proto);
		break;
	case STP_MSGTYPE_RSTP:
		stp_print_cbpdu(p, len, STP_PROTO_RSTP);
		break;
	case STP_MSGTYPE_TBPDU:
		stp_print_tbpdu(p, len);
		break;
	default:
		printf(" unknown message (0x%02x)", *p);
		break;
	}

	return;

truncated:
	printf("[|802.1d]");
}

static void
stp_print_cbpdu(p, len, proto)
	const u_char *p;
	u_int len;
	int proto;
{
	u_int32_t cost;
	u_int16_t t;
	u_int8_t flags, role;
	int x;

	p += 1;
	len -= 1;

	printf(" config");

	if (len < 1)
		goto truncated;
	if (*p) {
		switch (proto) {
		case STP_PROTO_STP:
		case STP_PROTO_SSTP:
			flags = *p & STP_FLAGS_STPMASK;
			role = STP_FLAGS_ROLE_DESG;
			break;
		case STP_PROTO_RSTP:
		default:
			flags = *p & STP_FLAGS_RSTPMASK;
			role = (flags & STP_FLAGS_ROLE) >> STP_FLAGS_ROLE_S;
			break;
		}

		printb(" flags", flags, STP_FLAGS_BITS);
		switch (role) {
		case STP_FLAGS_ROLE_ALT:
			printf(" role=ALT/BACKUP");
			break;
		case STP_FLAGS_ROLE_ROOT:
			printf(" role=ROOT");
			break;
		case STP_FLAGS_ROLE_DESG:
			printf(" role=DESIGNATED");
			break;
		}
	}
	p += 1;
	len -= 1;

	if (len < 8)
		goto truncated;
	printf(" root=");
	printf("%x.", EXTRACT_16BITS(p));
	p += 2;
	len -= 2;
	for (x = 0; x < 6; x++) {
		printf("%s%x", (x != 0) ? ":" : "", *p);
		p++;
		len--;
	}

	if (len < 4)
		goto truncated;
	cost = EXTRACT_32BITS(p);
	printf(" rootcost=%u", cost);
	p += 4;
	len -= 4;

	if (len < 8)
		goto truncated;
	printf(" bridge=");
	printf("%x.", EXTRACT_16BITS(p));
	p += 2;
	len -= 2;
	for (x = 0; x < 6; x++) {
		printf("%s%x", (x != 0) ? ":" : "", *p);
		p++;
		len--;
	}

	if (len < 2)
		goto truncated;
	t = EXTRACT_16BITS(p);
	switch (proto) {
	case STP_PROTO_STP:
	case STP_PROTO_SSTP:
		printf(" port=%u", t & 0xff);
		printf(" ifcost=%u", t >> 8);
		break;
	case STP_PROTO_RSTP:
	default:
		printf(" port=%u", t & 0xfff);
		printf(" ifcost=%u", t >> 8);
		break;
	}
	p += 2;
	len -= 2;

	if (len < 2)
		goto truncated;
	printf(" age=%u/%u", p[0], p[1]);
	p += 2;
	len -= 2;

	if (len < 2)
		goto truncated;
	printf(" max=%u/%u", p[0], p[1]);
	p += 2;
	len -= 2;

	if (len < 2)
		goto truncated;
	printf(" hello=%u/%u", p[0], p[1]);
	p += 2;
	len -= 2;

	if (len < 2)
		goto truncated;
	printf(" fwdelay=%u/%u", p[0], p[1]);
	p += 2;
	len -= 2;

	if (proto == STP_PROTO_SSTP) {
		if (len < 7)
			goto truncated;
		p += 1;
		len -= 1;
		if (EXTRACT_16BITS(p) == 0 && EXTRACT_16BITS(p + 2) == 0x02) {
			printf(" pvid=%u", EXTRACT_16BITS(p + 4));
			p += 6;
			len -= 6;
		}
	}

	return;

truncated:
	printf("[|802.1d]");
}

static void
stp_print_tbpdu(p, len)
	const u_char *p;
	u_int len;
{
	printf(" tcn");
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: print-stp.c,v 1.9 2015/01/16 06:40:21 deraadt Exp $ */
2
3			/*
4			* Copyright (c) 2000 Jason L. Wright (jason@thought.net)
5			* All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the distribution.
15			*
16			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17			* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18			* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19			* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20			* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21			* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22			* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25			* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26			* POSSIBILITY OF SUCH DAMAGE.
27			*/
28
29			/*
30			* Pretty print 802.1D Bridge Protocol Data Units
31			*/
32
33			#include <sys/time.h>
34			#include <sys/socket.h>
35			#include <sys/file.h>
36			#include <sys/ioctl.h>
37
38			struct mbuf;
39			struct rtentry;
40			#include <net/if.h>
41
42			#include <netinet/in.h>
43			#include <netinet/ip.h>
44
45			#include <ctype.h>
46			#include <netdb.h>
47			#include <pcap.h>
48			#include <signal.h>
49			#include <stdio.h>
50
51			#include <netinet/if_ether.h>
52			#include "ethertype.h"
53
54			#include <net/ppp_defs.h>
55			#include "interface.h"
56			#include "addrtoname.h"
57			#include "extract.h"
58			#include "llc.h"
59
60			#define STP_MSGTYPE_CBPDU 0x00
61			#define STP_MSGTYPE_RSTP 0x02
62			#define STP_MSGTYPE_TBPDU 0x80
63
64			#define STP_FLAGS_STPMASK 0x81 /* strip unused STP flags */
65			#define STP_FLAGS_RSTPMASK 0x7f /* strip unused RSTP flags */
66			#define STP_FLAGS_TC 0x01 /* Topology change */
67			#define STP_FLAGS_P 0x02 /* Proposal flag */
68			#define STP_FLAGS_ROLE 0x0c /* Port Role */
69			#define STP_FLAGS_ROLE_S 2 /* Port Role offset */
70			#define STP_FLAGS_ROLE_ALT 1 /* Alt/Backup port */
71			#define STP_FLAGS_ROLE_ROOT 2 /* Root port */
72			#define STP_FLAGS_ROLE_DESG 3 /* Designated port */
73			#define STP_FLAGS_L 0x10 /* Learning flag */
74			#define STP_FLAGS_F 0x20 /* Forwarding flag */
75			#define STP_FLAGS_A 0x40 /* Agreement flag */
76			#define STP_FLAGS_TCA 0x80 /* Topology change ack */
77			#define STP_FLAGS_BITS \
78			"\20\1TC\2PROPOSAL\5LEARNING\6FORWARDING\7AGREED\10TCACK"
79
80			enum {
81			STP_PROTO_STP = 0x00,
82			STP_PROTO_RSTP = 0x02,
83			STP_PROTO_SSTP = 0x10 /* Cizzco-Eeeh */
84			};
85
86			static void stp_print_cbpdu(const u_char *, u_int, int);
87			static void stp_print_tbpdu(const u_char *, u_int);
88
89			void
90			stp_print(p, len)
91			const u_char *p;
92			u_int len;
93			{
94			u_int16_t id;
95			int proto = STP_PROTO_STP;
96
97			if (len < 3)
98			goto truncated;
99			if (p[0] == LLCSAP_8021D && p[1] == LLCSAP_8021D && p[2] == LLC_UI)
100			printf("802.1d");
101			else if (p[0] == LLCSAP_SNAP && p[1] == LLCSAP_SNAP && p[2] == LLC_UI) {
102			proto = STP_PROTO_SSTP;
103			printf("SSTP");
104			p += 5;
105			len -= 5;
106			} else {
107			printf("invalid protocol");
108			return;
109			}
110			p += 3;
111			len -= 3;
112
113			if (len < 3)
114			goto truncated;
115			id = EXTRACT_16BITS(p);
116			if (id != 0) {
117			printf(" unknown protocol id(0x%x)", id);
118			return;
119			}
120			switch (p[2]) {
121			case STP_PROTO_STP:
122			printf(" STP");
123			break;
124			case STP_PROTO_RSTP:
125			printf(" RSTP");
126			break;
127			default:
128			printf(" unknown protocol ver(0x%x)", p[2]);
129			return;
130			}
131			p += 3;
132			len -= 3;
133
134			if (len < 1)
135			goto truncated;
136			switch (*p) {
137			case STP_MSGTYPE_CBPDU:
138			stp_print_cbpdu(p, len, proto);
139			break;
140			case STP_MSGTYPE_RSTP:
141			stp_print_cbpdu(p, len, STP_PROTO_RSTP);
142			break;
143			case STP_MSGTYPE_TBPDU:
144			stp_print_tbpdu(p, len);
145			break;
146			default:
147			printf(" unknown message (0x%02x)", *p);
148			break;
149			}
150
151			return;
152
153			truncated:
154			printf("[\|802.1d]");
155			}
156
157			static void
158			stp_print_cbpdu(p, len, proto)
159			const u_char *p;
160			u_int len;
161			int proto;
162			{
163			u_int32_t cost;
164			u_int16_t t;
165			u_int8_t flags, role;
166			int x;
167
168			p += 1;
169			len -= 1;
170
171			printf(" config");
172
173			if (len < 1)
174			goto truncated;
175			if (*p) {
176			switch (proto) {
177			case STP_PROTO_STP:
178			case STP_PROTO_SSTP:
179			flags = *p & STP_FLAGS_STPMASK;
180			role = STP_FLAGS_ROLE_DESG;
181			break;
182			case STP_PROTO_RSTP:
183			default:
184			flags = *p & STP_FLAGS_RSTPMASK;
185			role = (flags & STP_FLAGS_ROLE) >> STP_FLAGS_ROLE_S;
186			break;
187			}
188
189			printb(" flags", flags, STP_FLAGS_BITS);
190			switch (role) {
191			case STP_FLAGS_ROLE_ALT:
192			printf(" role=ALT/BACKUP");
193			break;
194			case STP_FLAGS_ROLE_ROOT:
195			printf(" role=ROOT");
196			break;
197			case STP_FLAGS_ROLE_DESG:
198			printf(" role=DESIGNATED");
199			break;
200			}
201			}
202			p += 1;
203			len -= 1;
204
205			if (len < 8)
206			goto truncated;
207			printf(" root=");
208			printf("%x.", EXTRACT_16BITS(p));
209			p += 2;
210			len -= 2;
211			for (x = 0; x < 6; x++) {
212			printf("%s%x", (x != 0) ? ":" : "", *p);
213			p++;
214			len--;
215			}
216
217			if (len < 4)
218			goto truncated;
219			cost = EXTRACT_32BITS(p);
220			printf(" rootcost=%u", cost);
221			p += 4;
222			len -= 4;
223
224			if (len < 8)
225			goto truncated;
226			printf(" bridge=");
227			printf("%x.", EXTRACT_16BITS(p));
228			p += 2;
229			len -= 2;
230			for (x = 0; x < 6; x++) {
231			printf("%s%x", (x != 0) ? ":" : "", *p);
232			p++;
233			len--;
234			}
235
236			if (len < 2)
237			goto truncated;
238			t = EXTRACT_16BITS(p);
239			switch (proto) {
240			case STP_PROTO_STP:
241			case STP_PROTO_SSTP:
242			printf(" port=%u", t & 0xff);
243			printf(" ifcost=%u", t >> 8);
244			break;
245			case STP_PROTO_RSTP:
246			default:
247			printf(" port=%u", t & 0xfff);
248			printf(" ifcost=%u", t >> 8);
249			break;
250			}
251			p += 2;
252			len -= 2;
253
254			if (len < 2)
255			goto truncated;
256			printf(" age=%u/%u", p[0], p[1]);
257			p += 2;
258			len -= 2;
259
260			if (len < 2)
261			goto truncated;
262			printf(" max=%u/%u", p[0], p[1]);
263			p += 2;
264			len -= 2;
265
266			if (len < 2)
267			goto truncated;
268			printf(" hello=%u/%u", p[0], p[1]);
269			p += 2;
270			len -= 2;
271
272			if (len < 2)
273			goto truncated;
274			printf(" fwdelay=%u/%u", p[0], p[1]);
275			p += 2;
276			len -= 2;
277
278			if (proto == STP_PROTO_SSTP) {
279			if (len < 7)
280			goto truncated;
281			p += 1;
282			len -= 1;
283			if (EXTRACT_16BITS(p) == 0 && EXTRACT_16BITS(p + 2) == 0x02) {
284			printf(" pvid=%u", EXTRACT_16BITS(p + 4));
285			p += 6;
286			len -= 6;
287			}
288			}
289
290			return;
291
292			truncated:
293			printf("[\|802.1d]");
294			}
295
296			static void
297			stp_print_tbpdu(p, len)
298			const u_char *p;
299			u_int len;
300			{
301			printf(" tcn");
302			}